Search Results - "JEFFERIES, RICHARD P. S."

Paired gill slits in a fossil with a calcite skeleton by Jefferies, Richard P. S, Dominguez, Patrício, Jacobson, Antone G

“…The chordates, hemichordates (such as acorn worms) and echinoderms (such as starfish) comprise the group Deuterostomia, well established as monophyletic. Among…”
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ICHNOLOGICAL INSIGHTS INTO MITRATE PALAEOBIOLOGY by RAHMAN, IMRAN A., JEFFERIES, RICHARD P. S., SÜDKAMP, WOUTER H., SMITH, RU D. A.

“…:  Mitrates are a controversial group of extinct deuterostomes; there is little agreement over their affinities, functional morphology or even the orientation…”
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Locomotion, shape, ornament, and external ontogeny in some mitrate calcichordates by Jefferies, Richard P. S.

“…The paper describes the external shape and ornament of four stem-vertebrate mitrates (Mitrocystites mitra, Mitrocystella incipiens, Ateleocystites…”
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